Spray valve



Patented Apr. 28, 1925i.

UNITED STATES PATENT OFFICE.

CLARENCE W. CLE'MENTZ, OF JACKSONVILLE, FLORDA, ASSIGNOR T0 ENGINECOIVIPANY, F JACKSONVLLE, FLRIDA, A COR-PRATION Ol? CRuPlNKLESS FLORIDA.

SPRAY VALVE.

Application filed August 17, i922. Serial No. 582,566.

To c/ZZ iff/icm may concern.

lle it known that l, CLARENCE 7. CLEM- ENT@ a citizen of theUn'itedStates, residing at Jacksonville.y in the county of Duval and @tate of`llloridzu have invented certain new and useful Tmproveinents in SprayValves, of which the following v.is a specification.

My said invention relates to a spray valve for internal combustionengines and it is an l0 object thereof to provide a valve in which videa device of this character which shall be simple and economicaltomani'i'tacture,`

being composed of few and simple parts. This also enables the device `tobe quickly and easily repaired without undue expense.

The single drawing shows a. vertical section of the device in positionon a cylinder.

ln the drawing reference character 10 indicates a cylinder ofconventional type having an opening 11 in which the lower portion of thevalve is situated. The spray valve housing 12 has a flange extendingover the opening and secured in place by bolts or other conventionalmeans. At its lower end the housing partially encloses a valve casing 13having a flange 14 extending between theV cylinder and the flange of thebody member. A packing 15 is situated between the cylinder and theflange 14. The valve casing has a fuel inlet at 16 leading to alongitudinal passage 17, which extends fromend to end of the casing. Thecasing has a central valve chambe closed at one end byV a gland 18 andhaving located therein a pair of bushings 19 and 20, which may be heldin place by having a driving fit, or by other known means. lt will benoted that the external diameter of the lower bushing is the same asthat of the lower flange of the upper bushing. At the lower end of thecasing is a conical casing head 21 held in place by the spray tip 22having' screw-threaded engagement with the end of the casing and holding'the casingv head in place. The spray tip has a perforation 23 taperingat both ends and communi- The channels 211 extend radially of the headand then upwardly through it, opening near the periphery of a chamber 25beneath bushing 20, which chamber is in communication with the passage17. A' chamber 26 `between the. bushings also communicates with saidpassage.

A. valve 27 is slidably mounted in the bushings 1S) and 20, the portionof the valve in bushing 19v being of smaller diameter than that inbushing 20, thus forming an upwardly facing ledge in the chamber 26. Atits lower end the valve has a tip 28 ending in a tapering formationadapted to close off the passages 241. The tip 28 is considerablysmaller than the valve section in bushing 19, thus leaving` a downwardlyfacing ledge at the upper end of the tip in the chamber 25 of largersurface than the similar face in the chamber 26.

A tappet 29 is pivotcd at 30 on the body 12 and has a rounded faceengaging a nut 31 held in place by lock-nut 32 on a stem 33 adapted tocontact with the upper end of the valve 27. The stem is normally helddown by a. spring 34- bearing at its upper end `against. a shoulder 35on sleeve 36. This sleeve is loosely mounted in an opening of thehousing 12 and its position is determined by adjustment of a cap 37. Atthe lower end of the stem 33 is a leak-off' passage 38 communicatingwith a chamber 39 surrounding the lower end of the stem and the upperend of the valve 27. This provides for escape of such small amount ofoil as may leak by the valve and the bushings 19 and 20, which have aminute clearance (.0001 in.) and are not packed.

ln the operation of my device, the stem 33 is moved up and down bytappet 29 in the usual manner. The fuel in the passage 17, chamber 25and communicating passages in head 21 is under heavy pressure as usual,vand such pressure may build up, if desired, while the valve is closed,or may be substantially constant. After the stem 33 is raised, the valve27 will be raised by the differential pressure on the oppositely facingledges in chambers 25 and 26. The proportions of the parts are such thatthe ledge in chamber 25 is spaced from head 21 even when the valve isclosed, thus permitting the oil pressure to open the valve, as above setforth. The pressure on the fluid being high the valve will immediatelybe aised when the pressure of the stein is removed therefrom and the tip28 will be Withdrawn from the spray valve passage 23, thus opening comniunication between the fuel passages and the cylinder.

Having 'Lully described my invention, what claim as new and desire tosecure by Letters Patent, is:

l. A spray valve comprising a valve casing having a longitudinal fuelpassage and a valve chamber, a valve in the chamber having a centralenlarged portion and being reduced at its ends, a bushing about theenlarged portion, a bushing about the upper reduced portion spaced fromthe irst to l'orm a pressure chamber' and coacting with the end ot theenlarged portion to form a stop for the valve, a head surrounding thelower reduced portion and providing a pressure chamber between it andthe lower bushing, a spray tip, and passages leadingfrom the main `tuelpassage to each oi. said chambers, and also through the head to thespray tip, substantially as set forth.

2. ln a spray valve for internal combustion engines, a cylindrical valvecasing having an annular flange, a housing surrounding the casing andits flange and adapted to be secured to the engine, a valve in thecasing having a central enlargement said casing having an inner boredivided by circumferential shoulders into parts of different diameter,bearing means interposed bet-Ween the casing and the valve and providingditi'erential pressure chambers adjacent said shoulders, and a removablespray tip at the Jfoot of the casing providing for the removal of thebearing means, substantially as set forth.

3. ln a spray valve for internal combus tion engines, a cylindricalvalve casing having an annular flange, a housing surrounding the casingand its flange and adapted to be secured to the engine, a valve in thecasing having a central enlargenient said casing having an inner boredivided by circumferential shoulders into parts of dilierent diameter,bearing means interposed between the casing and the valve and providingdifferential pressure chambers adjacent said shoulders, a removableconical casing head surrounding the lower reduced end ol the valve, anda removable spray tip at the foot of the casing providing for theremoval of the other parts from the casing, substantially as set forth.

ln Witness whereof, I have hereunto set my hand at Jacksonville,Florida, this 12th day of August, A. D. nineteen hundred and twenty-two.

CLARENCE W. CLEMENTZ. Witnesses:

J. L. Doss, Jr., GLADYS Cox.

